When a Goodman furnace stops working in the middle of a Central Florida winter night — even if Orlando's cold means temperatures in the 40s rather than the sub-zero conditions northern states face — the discomfort and stress are real. Goodman is one of the most widely installed furnace brands in the country, known for reliability and value, but like any mechanical system, Goodman furnaces can develop problems that require diagnosis and repair. AmeriTech Air Conditioning and Heating has serviced hundreds of Goodman furnaces throughout Orlando, Winter Park, Maitland, Kissimmee, and across Central Florida since 2009, and we are here to help you understand the most common reasons a Goodman furnace stops working — and what you can do about it.
Start With the Basics: Easy Checks Before Calling for Service
Before diving into complex diagnostics, there are several simple checks that can identify obvious causes and potentially restore operation without a service call. These are safe for any homeowner to perform and often resolve the issue immediately.
- Check the thermostat settings: Verify that the thermostat is set to Heat mode and that the set-point temperature is at least 3 to 5 degrees above the current room temperature. In Central Florida, thermostats are often left in Cool mode through the warm months and never switched back when the first cold snap arrives.
- Replace thermostat batteries: A thermostat with dead or dying batteries may appear to be on but cannot send a proper heat call signal to the furnace. Replace with fresh AA or AAA batteries depending on your thermostat model.
- Check the circuit breaker: Locate the breaker labeled for the furnace or air handler in your main electrical panel. A tripped breaker will be in the middle position. Switch it fully off, wait 30 seconds, and then firmly switch it back on.
- Check the furnace power switch: Most furnaces have a wall switch mounted on or near the furnace cabinet. This switch is easy to accidentally flip off. Ensure it is in the on position.
- Check the air filter: An extremely clogged filter can trigger the high-limit safety switch, shutting the furnace down. If the filter is heavily loaded, replace it and attempt to restart.
- Check the LED fault code: Modern Goodman furnaces display a blinking LED code on the control board, visible through a small observation window on the furnace cabinet. The wiring diagram inside the cabinet door decodes each pattern. This is the fastest way to identify what the control board has detected as the fault.
Common Reasons a Goodman Furnace Stops Working
When the basic checks do not reveal the problem, the issue typically lies within the furnace itself. Goodman furnaces, while generally reliable, experience the same failure modes common to all gas furnaces — and Central Florida's long periods of dormancy between heating seasons can accelerate some of these issues.
Failed Igniter
Goodman gas furnaces use a hot surface igniter — a small silicon carbide or silicon nitride element that glows red hot to ignite the gas burner — rather than a standing pilot light. These igniters have a typical lifespan of 3 to 7 years and are one of the most frequently replaced furnace components. A failed igniter will cause the furnace to attempt to start — you will hear the inducer fan motor and the gas valve click — but the burner will not light and the furnace will enter a lockout mode after three attempts. Replacing a Goodman igniter is a relatively straightforward and affordable repair, typically $100 to $200, and can often be completed on the first service visit.
Dirty or Faulty Flame Sensor
A dirty flame sensor can prevent the furnace's control board from confirming that ignition has occurred, causing the unit to shut off the gas valve within seconds of the burner lighting. This creates a pattern where the furnace lights briefly, then extinguishes, then attempts again — repeating this up to three times before locking out. A dirty flame sensor can sometimes be cleaned by an AmeriTech technician during a maintenance visit, while a failed sensor requires replacement at a similar cost to an igniter repair.
Pressure Switch Failure
Goodman 80% and 96% AFUE furnaces both use pressure switches to verify that the inducer motor is creating adequate negative pressure in the heat exchanger before allowing ignition to proceed. If the pressure switch fails open, the control board receives no signal and will not initiate the ignition sequence. A blocked flue vent, a cracked inducer motor housing, a clogged condensate drain in 96% AFUE models, or a failed pressure switch itself can all cause this symptom. AmeriTech's diagnostic process differentiates between these causes before recommending parts.
Cracked Heat Exchanger
The heat exchanger is the most critical safety component in a gas furnace. It separates the combustion gases — including carbon monoxide — from the air distributed throughout your home. Over years of thermal cycling, heat exchangers can develop stress cracks. A cracked heat exchanger is a serious safety hazard that requires immediate attention. Signs include the smell of combustion gases near the vents, soot deposits inside the air handler, carbon monoxide detector alarms, or a visual crack visible during inspection. A cracked heat exchanger in a Goodman furnace typically warrants furnace replacement unless the unit is still under manufacturer's warranty.
Control Board Failure
The control board is the brain of the furnace, coordinating the ignition sequence, monitoring safety switches, and controlling the blower motor. Control boards can fail due to voltage spikes during Central Florida's frequent summer thunderstorms, capacitor failures, or simply end-of-life component degradation. Replacement control boards for common Goodman models — GMVC96, GMSS96, GMEC96 — are typically available through AmeriTech's parts inventory, and a board replacement can often restore full function without requiring a new furnace.
Goodman Furnace Maintenance for Central Florida Homeowners
In Orlando and across Central Florida, furnaces often sit dormant for six to eight months between heating seasons. This extended dormancy allows dust to accumulate on the burners, igniters, and flame sensors, allows condensate trap components in high-efficiency models to dry out and potentially crack, and allows pest intrusion into the cabinet through venting passages. Annual pre-season maintenance — scheduled in October before the first cold weather — is particularly important for Central Florida furnaces to ensure reliable operation when heating is needed.
AmeriTech's Goodman furnace tune-up includes burner cleaning and inspection, flame sensor cleaning, igniter inspection and testing, heat exchanger visual inspection, flue vent inspection, combustion analysis, and blower motor testing. Homeowners in Winter Park, Maitland, Longwood, and throughout Central Florida who schedule annual maintenance with AmeriTech consistently experience fewer emergency service calls and longer equipment life.
Contact AmeriTech for Goodman Furnace Repair in Orlando
If your Goodman furnace is not working and the basic checks have not resolved the issue, AmeriTech Air Conditioning and Heating is ready to help. With 12 service vehicles covering the Greater Orlando metro area, factory-trained technicians with deep Goodman expertise, and a 4.9 Google rating earned through honest, expert service since 2009, AmeriTech is Central Florida's trusted choice for Goodman furnace repair.
Call AmeriTech at (407) 532-8000 to schedule a furnace diagnostic. We service all Goodman furnace models throughout Orlando, Winter Park, Maitland, Kissimmee, Sanford, Apopka, Altamonte Springs, and all surrounding Central Florida communities. Same-day service is available for heating emergencies.
Goodman Control Board Diagnostics in Central Florida
The control board is the brain of a Goodman furnace, and it is often where problems that manifest as "furnace not working" actually originate. Goodman control boards communicate issues through a diagnostic LED that flashes specific sequences corresponding to fault codes documented in the furnace's installation manual. When AmeriTech receives a call from an Orlando homeowner whose Goodman furnace is not working, reading the control board LED fault code is one of the first diagnostic steps our factory-trained technicians perform. Common Goodman fault codes encountered in Central Florida include:
- 2 flashes: System lockout after multiple failed ignition attempts — usually indicates a faulty igniter, flame sensor, or gas supply issue
- 3 flashes: Pressure switch stuck open or closed — often caused by a blocked flue, failed inducer motor, or cracked pressure switch tubing
- 4 flashes: High-limit switch trip — most commonly caused by restricted airflow from a clogged filter or blocked return air
- 5 flashes: Flame sensed when no flame should be present — indicates a leaky gas valve or flame sensor location issue
- 7 flashes: Gas valve circuit issue — may indicate a failed gas valve or wiring problem in the gas valve circuit
Gas Supply Issues Unique to Orlando-Area Homes
Natural gas supply problems are less common in Central Florida than in northern states simply because fewer homes here rely on gas heat, but they do occur. If multiple gas appliances in your home fail simultaneously — furnace, water heater, stove — a gas supply issue rather than a furnace problem is the likely cause. Contact your gas utility to verify normal supply pressure before concluding the furnace itself has failed. For homes using propane rather than natural gas, ensure the propane tank has adequate fuel — propane tanks that run dry can require line bleeding and re-lighting by a qualified technician before normal furnace operation resumes.
The Role of the Inducer Motor in Goodman Furnace Operation
Before a Goodman furnace can ignite, the inducer motor must start and build sufficient negative pressure in the heat exchanger to close the pressure switch and signal the control board that it is safe to proceed with ignition. In Central Florida, where furnaces sit dormant for most of the year, inducer motor bearings can corrode or seize from disuse. When the inducer motor fails to start or runs erratically, the furnace will not ignite — a symptom that is often misdiagnosed as an igniter or gas valve problem by less experienced technicians. AmeriTech's diagnostic process always verifies inducer motor operation before testing downstream components.
Inducer motor replacement on Goodman furnaces in the Greater Orlando area typically costs $300 to $600 including parts and labor. When the inducer motor is replaced, AmeriTech technicians also inspect the pressure switch tubing connected to it, as cracked or disconnected tubing will prevent normal furnace operation even with a functioning new motor. Our 12 service vehicles carry inducer motors for the most common Goodman models to ensure same-visit repairs whenever possible.
Annual Furnace Tune-Up: AmeriTech's Recommended Maintenance for Central Florida
Because Central Florida's furnaces sit idle for six to eight months each year, annual tune-up timing matters. AmeriTech recommends scheduling your Goodman furnace tune-up in October or early November, before the first cold nights arrive in the Orlando area. This timing ensures the system is inspected and serviced before you need it, rather than discovering a problem on the first 50-degree night of December when repair schedules fill quickly throughout Winter Park, Maitland, and the Greater Orlando metro. Our comprehensive tune-up includes igniter testing, flame sensor cleaning, heat exchanger inspection, flue inspection, filter replacement, and a full operational test to verify normal ignition cycle timing. Call AmeriTech at (407) 532-8000 to schedule your fall furnace tune-up.